[mythtv-users] How do you reliably provide HDHR dhcp?

John Finlay finlay at moeraki.com
Mon Oct 24 20:50:59 UTC 2011

I have a couple of original HDHR tuners that work well but occasionally 
go offline because of long power outages in my area. The problem is that 
the HDHRs can only get their IP address via dhcp (if only they could be 
set to use a static IP my problems would disappear) and if there is a 
long power outage I run out of UPS battery power and all my systems go 
down. Unfortunately the HDHRs come up faster than the dhcp server (a 
linux server) and eventually appear to timeout on dhcp access and stop 
trying to retrieve an IP address. When the dhcp server eventually comes 
online it never sees the HDHRs. This causes my mythtv backend to lose 
access to the HDHR tuners and all recordings fail. The only way to fix 
this is to power cycle the HDHRs while the dhcpd server is up and running.

Unfortunately if I'm away on a trip and one of these power outages 
occurs I'm not there to power cycle the HDHRs and so I get no recordings 
until I return.

I chose to use the linux dhcpd server because it provides extra info 
(gateway, domain name, dns server, etc.) to dhcp clients in comparison 
with router dhcp servers. This helps with my other systems that use dhcp 
to retrieve IP address, etc.

Having just gone through an episode of power outage shortly after I left 
on a trip and having all recordings fail in the interim I'm wondering if 
someone else can suggest a better dhcp server scheme that will handle 
the power outage problem and ensure that the HDHR tuners will reliably 
get an IP address?


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